GATE Analog and Digital Electronics: Sequential Logic – Previous Year Questions

3 GATE previous year questions on Sequential Logic (Analog and Digital Electronics, Biomedical Engineering) with answers and explanations, from every paper.

1. GATE 2022 BM Q16 (1 mark, Multiple choice) – The shown logic circuit operates at 1 V. NAND and XNOR input-to-output delays are 200 ps and 400 ps respectively. At t=T, A=0,B=1,Z=0. At t=2T inputs…
2. GATE 2024 BM Q21 (1 mark, Multiple choice) – The shown 2:1 multiplexer feeds Q back to input 1 and D to input 0, selected by clk. What circuit does it implement?
3. GATE 2026 BM Q64 (2 marks, Numerical answer) – In the shown cross-coupled NAND circuit, each NAND delay is 4 ns and the NOT delay is 1 ns. Input is a 10 MHz clock with 50% duty cycle. Find the…